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Back to active CVEs
High · CVSS 8.6CVE-2026-127208

datamodel-code-generator < 0.84.0 Code Injection via x-python-type AnnotationCVE-2026-127208

Answer in brief

CVE-2026-127208 records a High severity (CVSS 8.6) vulnerability in datamodel-code-generator < 0.84.0 Code Injection via x-python-type Annotation. The current sources do not mark it as known exploited. The current feed maps datamodel-code-generator/datamodel-code-generator (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 12, 2026Updated Nov 12, 2026Source checked Nov 12, 2026First seen by HOL Nov 12, 2026Material review Nov 12, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.6
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 8.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps datamodel-code-generator/datamodel-code-generator (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
datamodel-code-generator/datamodel-code-generatorgeneric>=0 <0.84.00.84.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for datamodel-code-generator/datamodel-code-generator.
  2. 2Review the reported fix. Update datamodel-code-generator/datamodel-code-generator to 0.84.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 12, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 12, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 12, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

datamodel-code-generator before 0.84.0 contains a code injection vulnerability that allows attackers to achieve arbitrary code execution by supplying a malicious JSON Schema with a crafted x-python-type annotation containing a string ast.Constant node in a subscript slice position, which bypasses validation in parse_python_type_annotation and _python_type_expr_from_ast. Attackers can embed malicious Python expressions such as __import__ calls within quoted string literals in the generated source code, which Pydantic v2 evaluates as a ForwardRef via eval() during model_rebuild(), resulting in arbitrary code execution on developer workstations, CI/CD pipelines, or applications that generate and import the produced models at runtime.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Governikus AusweisApp Mobile StartPAOSResponse cross site scriptingAlso CWE-94

Record context

Vulnerability class
RCE
EPSS
Not reported
CWE IDs
CWE-94
Source
CVE List V5
Source checked
Nov 12, 2026
References
3 linked sources
Open source record